Vibrating pick for cleaning and treatment of the surfaces of objects



VIBRATING'PICK FOR CLEANING AND TREATMENT OF THE SURFACES OF OBJECTS .J.c. $ZHMIDT Filed July 2. 1924 Patented Feb. 4, 1930 f 1 UNITED STATESPATENT, OFFICE;

JOHAN CHRISTIAN SCHMIDT, F COPENHAGEN, DENMARK VIBRATING PICK FORCLEANING AND TREATMENT OF THE SURFACES 0F OBJECTS Application filed July2, 1924, Serial No. 723,848, and in Denmark July 6,1923.

The present invention relates to a hammering tool or vibrating pick forcleanlng and treatment of the surfaces of 013160138, in particularmetallic surfaces such as the surfaces of steam boilers for scale, shipshulls j for rust-and deposits, or for other slmllar purposes. Thecharacteristic feature of the invention consists therein that thevibrating pick contains a rapidly revolving spindle, lo the center ofgravity of which hes outside its axis of rotation so that violentvibrations will proceed from the said spindle which vibrations aretransmitted to the surface to v be treated, either directly by means ofa tool attached to said spindle or indirectly by means of a tool whichis fitted to the tube or the frame in which the revolving spindle isjournalled. When the tool is fitted to the revolvingv spindle itself, itwill participate '20 in the revolution of the latter, but when it isarranged in connection with the frame or the like of the apparatus itwill be stationary and beonly affected by thevibrations proceeding fromthe sideheavy spindle.

In the accompanying drawing various constructional forms for carryingout the present invention are shown by way of example and describedhereinafter in the fol- .lowing specification. Fig. 1 is an apparatusvwith a revolving spindle which is journalled in a handle to which thetool proper is fitted. Fig. 2 is an apparatus for cleaning the boilertube plate and the outside of boiler tubes,

' in side view.

. f i 'Fig. 3 is thesame apparatus in end View, placed between a numberof boiler tubes to be cleaned.

As shown in Fig. 1 a spindle 5 is jour- 4 0 nalled in the'bearings 3 and4;, said spindle being connected by means of a flexible shaft '6 to ahigh-speed motor. The bearings 3 and 4 are disposed within a tube 7. The

I spindle 5 is made sideheavy by means of an eccentric weight8 securedby ascrew 9. When I said screw. 9 is loosened the weight 8 can I j bemoved along the spindle 5 and be secured any where on the same. To thetube 7 is fitted "a steel disc 10 sharpened along its 5 edge, which, inthe present form is the working tool proper. This disc is detachable andcan be exchanged for another of a larger or smaller diameter or of adifferent shape, or, if desired for a chisel, or the like. To the tube 7is fitted a handle 11. g

When the spindle 5 is made to revolve rapidly, the weight 8 will causeviolent vibrations to proceed from the said spindle. The

.tool 10 is then held with a slight pressure against the material to betreated, and the violent vibrations will be felt as quickly repeatedblows by the tool 1 0 against the surface. The tool 10 will not only besubjected to vibrations in the directions towards and away from thesurface to be treated, but also in lateral directions which, undercertain conditions, can be of advantage.

In the apparatus shown in Figs. 2 and 3 the rapidly revolving spindle 23is journalled intwo bearings 24 and 25 and carries aneccentricallyfitted weight 26. 'The bearings 24 and 25 are fitted to a frame 27 towhich isattached a handle 28. At each end of the frame 27 is provided apin 31, which, in the constructional form' shown, is parallel tothespindle 23, and to this pin is fitted a tool 32 which, as shown inFig. 3 has the shape of a cross. On the front side of this cross areprovided grooves crossing each other, so that betweenthe grooves sharpteeth are formed, and on the edges of the cross are notches renderingthem similar to a coarse file. The cross is made of steel and hardened.On the back of the cross 32 is a lug 29 which encloses the in 31. a j

The cross 32 is revolubly fitted on said pin '3l,'and is under theaction of a spring33,

which tends tomove the cross into the position shown in Fig. 2, inwhichthe cross stands vertically to the plane of the paper. The

cross may, however, be turned into the positionindicated by'dottedlines, in which it coincides with the plane of the frame 27 so that theapparatus can be inserted between the different boiler tubes disposed-ingroups parallel to each other. The spring 33 tends to hold thecross 32'in' the position shown in Fig. 2, andwill automatically return it intothis position, when, for some reason or other it has been removedtherefrom.

When the apparatus is to be used, the mounted on said'frame and springsadapted Weight 26 is turned as shown in the Fig.2 so '0 swing said toolsinto operating position at that it lies Within the plane of the frame27, right angles to the surface of said frame.

and the crosses 32 are turned into the position indicated by the dottedlines. In this positionthe apparatus is quite flat and may be easilyinserted between the different boiler tubes. After the apparatus hasreached the place Where it shall operate the crosses 32 are released andthese Will then, under action of the springs 33 assume the positionshown in F g. 2, Now he sp nd e 3 is s t o rap In Witness whereof heafiixes his signature. JOHAN CHRISTIAN SCHMIDT.

reuolution and violent vibrations Will proceed 7 therefrom Which willVia the, frame 27 be transmittedto the crosses 32. The shape of theseisad pte to e spa betw en the clividual boiler tubes, and when the apparratus is placed in such a manner that one of the crosses lies againstthe Wall of the boiler, from which the boiler tubes extend, the scaledeposited on this Wall Will be quickly picked of When, th reafte by mens of t e h d e 28 the appar u i moved t and fro alo g th'e'tubes, theedges of the crosses 32 will 2 pick the surface of the latter, so thatth seel wi e so be remo ed there rom. e

In Fig. 3 are shown fur boiler tubes 3%}, a the size of the cross. 82 isdimen ned according to. the sp ce b twe n hese, Th se four boi er ubeare arranged in a square bu When they are 1ispo'sed in a different po ii o e ch other, the too 2 may, instead i of the shapeofe cross, be giv nany th uitab e hape Aft r the spacesv between a group of tubes'has beecleane th press is gain tu d i o he plane ith hegfre 27 nd t e appara si ser ed nto n ther gr up of u s, whereupo t e lea ing is continued- Thespind e,

driving m orby a flexi le shaf f such a ength thatthe apparatus anWithout ny diifieulty,be moved about everywhere in the oile and the claning Wo k which wi hitherto known app ratus a e remely diffioult andexpensi e, can with the hereinbefore de c ibed ppara us e eomp eted in amuch:

more p fect degree t an has e er be n P esible'befQIe.

shown in the drawing a d h rein des ribed maybe varied in many mannersaccording to th purpose, for whie th app ra us is ,in-'

' tended he demands p t t i -W.i h th here desori ed pp ra u it isfurtherm e endered-poss ble to clean the b i er be fr m above, whiehwillhe the most conve i method.

- I). claim 1.v 7

A vibrating pick for cleaning and treatment of surfaces consisting of aframe, a rapidly revolvingspindle ournalled in said frame, a Weighteccentrically-fitted tovsaid spindle, a pick tool fitted to each end ofsaid frame, said pick tools swivelling on hinges 'sh u dbe Couple o t eThe constructional forms of the apparatus

